Paper-making machine.



rares-nahme ninemsn copecifmation of Letters Patent.

*Patented if?, freute?,

Application iled April 28, 1913n Serial N0. 763,950.

T0 atb fui/wm 'it may concern Be it known that l, "WILLIAM E. .Si-msnen., a citizen of the United States of America, residing at the city of Albany, in the county of Albany and State of New York, have invented certain -neuT and useful improvements in Paper-Making Machines, of which the following is a speciiication.

My invention relates to paper making machines and paper making processes, and the object of my invention is to provide a process and means for separating and pre venting the adhesion of the plastic paper or pulp to the covering oi' the roll.

accomplish this object as hereinafter described and illustrated.

Figure l is a section of a roil provided with a means for separating and preventing the adhesion of the plastic paper to the roll, Fig. 2 is a-section perfoi'mingthe result attained in l. Fig. 3 is an end elevation a modified torni with part broken away. Similar letters refer to similar parts throughout the several views.

As the plastic paper is carried along and comes in Contact with the roll in a paper making machine, its natural tendency is to stick thereto and be carried around with it vwhich occasions a great loss of time in removing the adhering mass. A My .process comprises passing a continuous plastic sheet of paper between coverings on perforated rolls; said. coverings made oi closely iitted, homogeneous fibrous material, and then forcing air through the under surface of the coverings on the rolls, destroying any force of suction or adhesion which may be exerted on the by the centrifugal motion oi the said y rolls and forming an air cushion between the paper and the said coverings on. the rolls.

I may accomplish this object by providing the roll, A, with the periorations, E, as shown in Fig.. l, theroll being 'suitabiy mounted in the trunnions, B, and having a pipe, C, provided with a flaring nozzle, l), adapted to extend beneath a portion of the inner surface of the roll, so that the air blown through the pipe will escape through the perforations, E, and be diffused through the' fibrous covering, F. i' show a pump, P,

for forcing the air through the pipe, G.

1n Fig. 2,

v communicating with oi a modified means for show another means tor delivering the air to the surface of the roll. I place in the roll, G, which is covered with felt or other brous material, H, a series ot chambers, J extending beneath the surtace oit the roll from one end, o, thereof to nearly thc opposite end and providing a series oi' perforations, h., through the roll the chambers, J, J, respectively. At one end, a, of the roll and mounted on the trunnion, K, which carries the roll, i place a tting, L, provided with a chamber, M, adapted to communicate with the chambers, J, J, when it registers with such chambers during the revolution of the roll. The fitting, L, revolves with the roll. Around the periphery ,of the itting, L, Si place a ring, ll, provided with an eniargecl portion, S, in which enlarged portion there is a chamber, T, the chamber, T, being opened toward the periphery of the ring, N. The pipe, 0, screwed into the enlarged portion, t5, of the ring, N, carries air from the pump to the chamber, T; troni thence it passes into the chambers, d, J, inthe roll. The ring, N, stationary.

The iibrous covering, E, entends entirely around and in close Contact withthe roll, providing a continuous fibrous surface with which the endless plastic web of paper en gages. This roll is used .as a press roll and 'when the air is forced or di'used through the covering, there is formed an air cushion betweenV the plastic material and the cover-- ing which renders the removal ofthe plastic material easy and prevents the breaking oi the plastic web, and also prevents taking out the pigments or Aminute hbrous material which otherwise would stick to the rollg What l claim as my invention and desire to secure by Letters Patent is:

i. ln a paper making machine, a hoilow perforated roli; a homogeneous ibrous materiel closely covering and extending entirely around said roll; and means for conducting to and discharging a current of air through the perorations in the roll into and., through the brought in contact with the plastic paper.

9.. A process comprising passing a continuous piastic sheet of paper between closely fitting, homogeneous iibrous coverings on perforated rolls, then forcing air through the coverings, destroying any force of suotion or adhesion exerted on the paper by the fibrous material andy centrifugal motion of the rolls and forming an air cushion between the paper and said coverings.

3. A process of separating and preventing the adhesion of an endless plastic web of paper to the homogeneous brous material closely covering the press roll of a paper making machine, comprising the delivery of a current of air into and through the ibrous material covering the roll and forming an 1o air cushion between the said fibrous material and the web. l

In testimony whereof I have aiXedmy signature in presence of two witnesses.

WILLIAM E. SHEEHAN.

Vitnesses:

FREDERICK W. CAMERON, GRACE PRIOR. 

